I came accross Roger Russell's webiste. The guy was Director of Acoustic Research at McIntosh Laboratory, and is the originator of McIntosh Loudspeakers.
There are alot of interesting informations on his website, some being excellent vaccine against Hifi silliness.
I initially landed there because i wanted information on some vintage Mcintosh using equalizer (an ancestor of Kef Kube).
There's alot of rare information about equaliser and loudspeaker design.
http://www.roger-russell.com/ml1cpg.htm
About column / tower loudspeakers:
http://www.roger-russell.com/columns/columns.htm
Hifi silliness vaccine :
http://www.roger-russell.com/truth/truth.htm#believing
(when he says all good amps sound the same, this guy have all the cool toys from Mcintosh. So "good" in is mind is 5000+ GBP, i guess).
In that section you got a must read part on subwoofer :
http://www.roger-russell.com/truth/trut ... subwoofers
if you read all that - congrats :)